The massive tendency for young people in developing countries to leave the countryside for big cities is called

A strict interpretation of the law of effect would not be a good way to explain how rhesus monkeys learn a fear of snakes because:

a. fear of snakes is inborn and need not been learned b. the law of effect has been found to be incorrect where higher species are concerned c. monkeys are genetically incapable of learning through the law of effect d. it would require the monkeys learn through trial-and-error and risk being bitten

In a study on expert performance, Ericsson et al. (1993 ) reported that top-level performers practice their craft:

A) ?for only one or two hours per day. B) ?for eight or more hours per day. C) ?only when they feel like practicing. D) ?for about four hours per day.